Fixes #49: Debounce scroll event handling

[a-kriya]

Also removed both calls to bind:

• by declaring getCurrentDistance as a method (since it was using this.$el anyway)
• by moving scrollHandler as a debounced method

[codecov]

Codecov Report

Merging #51 into master will decrease coverage by 6.66%.
The diff coverage is 84.21%.

@@ Coverage Diff @@ ## master #51 +/- ## ========================================== - Coverage 100% 93.33% -6.67%  ========================================== Files 1 1 Lines 58 60 +2 Branches 11 11 ========================================== - Hits 58 56 -2  - Misses 0 1 +1  - Partials 0 3 +3

Impacted Files	Coverage Δ
src/components/InfiniteLoading.vue	93.33% <84.21%> (-6.67%)	⬇️

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[PeachScript]

Thank you! But I need some time to think about it, and...the unit test was failed.

Best regards.

[ndelvalle]

@Syn-zeta Nice work dude, I think the debounce is a good idea.

[PeachScript]

Thanks for your attention @ndelvalle @matiastucci , @Syn-zeta has provided a very good idea, I was closed this PR before because the unit tests were not ready for the debounce, and I am doing refactoring now, include the full unit tests and the debounce feature base on @Syn-zeta 's PR :D

[a-kriya]

That's great. Thank you, @PeachScript.

[PeachScript]

You're welcome, thanks for your idea to help this component get better @Syn-zeta